Methodology
This paper presents the dynamic time history analysis and response spectrum analysis of a concrete gravity dam by using STAAD-PRO. A concrete gravity dam of different heights 70 m, 90 m and 110 m model is prepared in STAAD-PRO to perform the time history analysis and response spectrum analysis. Finite element has been widely used in the analysis of concrete gravity dams with a defined approach as presented in this paper. Time history is basically a method of seismic analysis for the simulation of an earthquake motion. It is an ultimate tool to study the dynamic response of a structure. In this paper gives time history analysis by using time-acceleration data as input function and then performance of the gravity dam is evaluated with various mode shapes and time-acceleration results. In Response Spectrum method, results are obtained by using medium soil factors and other criteria’s from IS 1893 are used and the results are compared in both the cases. Various basic loads and load combinations are used in analysis of concrete gravity dam according to IS 6512:1984 [4]. Table 4 represents basic loads and load combinations used during the